BaseStrategy

- refactoring

strategy.go

@@ -45,11 +45,11 @@ func (strategy BaseStrategy) MarketId() string {
 }
 
 func (strategy BaseStrategy) PositionSymbols() map[Side]string {
-	panic("implement me")
+	return nil
 }
 
 func (strategy BaseStrategy) PositionProbabilities() map[Side]float64 {
-	panic("implement me")
+	return nil
 }
 
 func (strategy BaseStrategy) Interval() uint8 {
@@ -61,7 +61,7 @@ func (strategy BaseStrategy) Cooldown(periods uint8) time.Duration {
 }
 
 func (strategy BaseStrategy) Handle(market Market, probability Probability) error {
-	panic("implement me")
+	return nil
 }
 
 func (strategy BaseStrategy) Symbols() []string {